Our long-lasting waterproof liquid eyeliner pen (black) is carefully formulated with VP/DMAPA acrylic (ester) copolymer and glycerin. Specially designed for smooth drawing outlining a clear and flowing eyeliner contour with a waterproof and sweat-resistant formula long-lasting makeup effect and less prone to smudging. The usage method is extremely convenient: 1. Shake the eyeliner well. 2. Along the base of the eyelashes slowly draw from the inner corner of the eye to the outer corner. You can appropriately elongate the outer corner of the eye. 3. If there is a mistake in the drawing use a cotton swab dipped in makeup remover to wipe and correct it. Moreover it has uniform coloring and good color display easily creating deep eyes. The pen tip is delicate and flexible precisely controlling the thickness of the stroke.